Geospatial file types are also referred to as GIS files.

Not all data from CAD needs to go to GIS. Usually those features that represent real world items are translated. These include road alignments, property lines, and water networks and so on. Geospatial file types do not deal well with annotation and dimensions.

Geospatial features can only contain one geometry type: point, line or polygon, During the export process creation, OpenCities Map determines the feature type based on the first element it finds on a level. For example, if the first element found is a point, then the feature type for that level becomes Point . Other elements on the same level that are lines or polygons will not be exported.

CAD features often represent survey accurate engineering objects, including circles with a defined radius, arcs, b-splines etc. These will be converted to lines when translated to the selected geospatial file type.

Tips:

• Ensure each level contains a single feature type: point, line or polygon.
• Keep annotations, dimensions, tick marks and other non-GIS data apart from the GIS features.
• Use the largest stroking tolerance that will still produce suitable results. This will result in smaller and faster geospatial files.